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The dreaded "Cannot find version 1"

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As many others I had to delete quite a few old backup files and I did that in Windows Explorer. I understand it shouldn't be done that way, but I searched for the proper way and I couldn't find much. Maybe there should be a fairly obvious option for that in the program. Maybe there is and it was looking at me in the face.

In any case, now the backups don't work anymore. How do I fix that? I've read about doing a validate, it fails without any prompt or option for me to try, it just plain fails with a red mark and when I click on it it says the backup is corrupted.

I've also tried to do a "recover files", no luck there either, "cannot find version 1" and I can only cancel or browse to find the no longer existing version 1.

Any options? TIA

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Jose, given the issues you have described above, the best way forward at this point would be as follows:

Remove the task settings for the problem task in the GUI, leave the backup files alone.

Use the option (hidden to the right of Add <new backup>) to Add existing backup and select the most recent .tib file for your removed backup task.

Reconfigure the new added task including renaming the task name and configuring any schedule for the task etc.  

Finally either run or validate the new task.

One important point:  when you deleted your old backup files via Explorer, you must leave behind 'complete version chains' if you want these to be viable for any recovery.  A complete version chain = a Full plus all associated Incremental files that share the same _b?_ identifier in the file name.  For a differential version chain, then only the Full plus the latest differential would be considered as being complete.